The system of"Ziguimusi"(子贵母死,which literally means"son became the emperor and his mother had to die")was implemented in the harem of the Northern Wei dynasty.The emperor of Daowu founded this system in order to prevent empresses who had tribal backgrounds participating in the royal succession and accordingly controlling the country's supreme power.After the harem system was perfected,this system gradually became the one in which the queen tended the prince in order to control the state power.
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